Spark Plug Blown Leads To Bore Damagehas this happened to anyone ?
Posted 21 November 2012 - 11:57 AM
Posted 24 November 2012 - 04:09 PM
The metal on a head should be much stronger than on a plug thread.
Unless the plug can be proved to have been cross threaded or defective then it's on them.
Do not back down!
They're trying to do a slippery one on you.
No way a blown plug should do that much damage, that's more of a symptom than a cause.
Posted 24 November 2012 - 04:53 PM
Posted 24 November 2012 - 05:06 PM
Were the values damaged too?
I'd reckon over pressure on the exhaust stroke so likely fault would be jammed outlet valves, timing belt, push rods or something in the rocker cover area.
Posted 24 November 2012 - 05:38 PM
No I won't go away.
Posted 24 November 2012 - 06:55 PM
Posted 24 November 2012 - 07:03 PM
Posted 24 November 2012 - 07:24 PM
I still reckon the plug blowing was caused by an overpressure in the cylinder on the exhaust stroke (not on ignition phase unless the plug was very loose or threads were crossed) and that to me would be a symptom of bent or snapped valve stems or push rods possibly from not enough oil to the stem seals.
Ford are really pushing their luck on this one.
Pity you can't get your hands on the swapped parts so that another mechanic could have had a look.
Posted 25 November 2012 - 01:07 AM
Were you driving when this event occurred or did it appear in the garage?
How old is the car and where was it serviced, main dealer?
Did it happen after a service by any chance?
Posted 25 November 2012 - 11:07 AM
On Inspection it was found to be caused by Number 4 spark plug failure. Number 4 spark plug ceramic had broken up inside the engine. All the spark plugs were replaced.
The Fiesta was booked in for diagnosis of the ticking noise on the 29.10.12 following the report from the service.
The engine has been stripped and examined. Number 4 cylinder bore is scored and to rectify this, a short block engine would be required.
They and we assumed it would be covered under warranty until we heard that Ford warranty had refused it. The ford warranty comes in two parts the Ford Base warranty (1st year) and then Ford Protect which is not so comprehensive- so beware that is their excuse. I had assumed at the time of purchase that we had the full manufacturers warranty.
Thanks for your interest and any help appreciated.
Posted 25 November 2012 - 07:52 PM
I would seek legal advice over this as it will be difficult to apportion blame.
Go here: http://www.honestjohn.co.uk/ and use the Ask Honest John column to ask for advice, they have a good legal team who can help and represent you.
Posted 09 April 2013 - 12:52 PM
Another sorry story of spark plug failure to report.
I had my 09 Fiesta serviced at the end of January, MOT on March 23rd (all with Ford dealers plus FSH from before) and then, March 24th, the spark plug collapses.The only option the Ford garage is giving me is a new engine.
Two weeks down the line and I am still without a car (the Ford dealership have put in a claim to Ford but I'm being led round in circles getting invoices for services from before I even owned the car etc.) No courtesy car so I'm forking out for rental, Ford keep "reminding" me that the car is not in warranty and as of this morning have been told it will be yet another 48 hours before they get back to me.
What no-one seems to understand (there are 3 ford deals involved and Ford Customer Relationship Centre) is that from my perspective, this is a Ford problem. From where I' m sitting, a Ford mechanic fitted Ford approved plugs at a service less than a year before the problem. I don't see how they cannot stand behind that - someone is at fault (plug supplier, ford engine design, ford dealer/service department) but it certainly isn't me.
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